Optimisation of Acid Hydrolysis in Ethanol Production from Prosopis Juliflora

Temesgen Atnafu Yemata

doi:doi:10.11648/j.ajee.20140206.11

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Optimisation of Acid Hydrolysis in Ethanol Production from Prosopis Juliflora

Temesgen Atnafu Yemata

Published in American Journal of Energy Engineering (Volume 2, Issue 6)

Received: 29 November 2014 Accepted: 17 December 2014 Published: 22 December 2014

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Abstract

Lignocellulosic materials (eg.Prosopis juliflora) can be utilized to produce ethanol, a promising alternative energy source for the limited crude oil. This study involved optimization of acid hydrolysis in ethanol production from prosopis juliflora. The conversion of prosopis juliflora to ethanol can be achieved mainly by three process steps: pretreatment of prosopis juliflora wood to remove lignin and hemicellulose, acid hydrolysis of pretreated prosopis juliflora to convert cellulose into reducing sugar (glucose) and fermentation of the sugars to ethanol using Saccharomyces cerevisiae in anaerobic condition. A two level full factorial design with four factors, two levels and two replicas (24*2=32 experimental runs) was applied to optimize acid hydrolysis and study the interaction effects of acid hydrolysis factors, namely, acid concentration, solid fraction, temperature, and time. An optimization was carried out to optimize acid hydrolysis process variables so as to determine the best acid concentration, solid fraction, temperature, and contact time that resulted maximum ethanol yield. The screening of significant acid hydrolysis factors were done by using the two-level full factorial design using design expert® 7 software. The statistical analysis showed that the ethanol yield of (40.91% (g/g)) was obtained at optimised acid hydrolysis variables of 0.5%v/v acid concentration, 5%w/w solid fraction, 105.01°C temperature, and 10 minutes hydrolysis time.

Published in	American Journal of Energy Engineering (Volume 2, Issue 6)
DOI	10.11648/j.ajee.20140206.11
Page(s)	127-132
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2014. Published by Science Publishing Group

Keywords

Prosopis Juliflora, Pretreatment, Hydrolysis, Fermentation, 2 Level Factorial, Optimization

References

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[5]	Mosier, N., et al., 2005, Features of promising technologies for pretreatment of lignocellulosic biomass, Bioresource Technology 96: 673-686.
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[8]	Shiferaw, H., Teketay, D., Nemomissa, S. and Assefa, F. (2004). Some biological characteristics that foster the invasion of Prosopis juliflora (Sw.) DC at Middle Awash Rift Valley Area,Northeastern Ethiopia. Journal of Arid Environments 58/135.154.
[9]	Taherzadeh MJ, Eklund R, Gustafsson L, Niklasson C, Lide´n G. 1997. Characterization and fermentation of dilute-acid hydrolyzates from wood. Ind Eng Chem Res 36:4659–4665.
[10]	Taye, T., Ameha, T., Adefiris, W. and Getu, E. (2004). Biological Impact Asssessment on selected IAS Plants on Native Species Biodiversity, Report submitted to EARO, Ethiopia, tree species in semi-arid Senegal. Forest Ecology and Management 176: 253-264.
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[13]	Wyman, C.E., Dale, B.E., Elander, R.T., Holtzapple, M., Ladisch, M.R. and Lee, Y.Y., (2005) Coordinated development of leading biomass pretreatment technologies. Bioresour. Technol. 96 1959-1966).
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[16]	Van Zyl, W., and Kargi, F., 2007, Consolidated Bioprocessing for bioethanol production using Saccharomyces cerevisiae Pages 205-235, Biofuels.
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[18]	Zhu JY, Pan XJ, Wang GS, Gleisner R (2009), "Sulfite pretreatment (SPORL) for Robust enzymatic saccharification of spruce and red pine". Bioresource Technology 100 (8): 2411–2418.doi:10.1016/j.biortech.2008.10.057. PMID 19119005

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Temesgen Atnafu Yemata. (2014). Optimisation of Acid Hydrolysis in Ethanol Production from Prosopis Juliflora. American Journal of Energy Engineering, 2(6), 127-132. https://doi.org/10.11648/j.ajee.20140206.11

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Temesgen Atnafu Yemata. Optimisation of Acid Hydrolysis in Ethanol Production from Prosopis Juliflora. Am. J. Energy Eng. 2014, 2(6), 127-132. doi: 10.11648/j.ajee.20140206.11

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AMA Style

Temesgen Atnafu Yemata. Optimisation of Acid Hydrolysis in Ethanol Production from Prosopis Juliflora. Am J Energy Eng. 2014;2(6):127-132. doi: 10.11648/j.ajee.20140206.11

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@article{10.11648/j.ajee.20140206.11,
  author = {Temesgen Atnafu Yemata},
  title = {Optimisation of Acid Hydrolysis in Ethanol Production from Prosopis Juliflora},
  journal = {American Journal of Energy Engineering},
  volume = {2},
  number = {6},
  pages = {127-132},
  doi = {10.11648/j.ajee.20140206.11},
  url = {https://doi.org/10.11648/j.ajee.20140206.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajee.20140206.11},
  abstract = {Lignocellulosic materials (eg.Prosopis juliflora) can be utilized to produce ethanol, a promising alternative energy source for the limited crude oil. This study involved optimization of acid hydrolysis in ethanol production from prosopis juliflora. The conversion of prosopis juliflora to ethanol can be achieved mainly by three process steps: pretreatment of prosopis juliflora wood to remove lignin and hemicellulose, acid hydrolysis of pretreated prosopis juliflora to convert cellulose into reducing sugar (glucose) and fermentation of the sugars to ethanol using Saccharomyces cerevisiae in anaerobic condition. A two level full factorial design with four factors, two levels and two replicas (24*2=32 experimental runs) was applied to optimize acid hydrolysis and study the interaction effects of acid hydrolysis factors, namely, acid concentration, solid fraction, temperature, and time. An optimization was carried out to optimize acid hydrolysis process variables so as to determine the best acid concentration, solid fraction, temperature, and contact time that resulted maximum ethanol yield. The screening of significant acid hydrolysis factors were done by using the two-level full factorial design using design expert® 7 software. The statistical analysis showed that the ethanol yield of (40.91% (g/g)) was obtained at optimised acid hydrolysis variables of 0.5%v/v acid concentration, 5%w/w solid fraction, 105.01°C temperature, and 10 minutes hydrolysis time.},
 year = {2014}
}

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TY  - JOUR
T1  - Optimisation of Acid Hydrolysis in Ethanol Production from Prosopis Juliflora
AU  - Temesgen Atnafu Yemata
Y1  - 2014/12/22
PY  - 2014
N1  - https://doi.org/10.11648/j.ajee.20140206.11
DO  - 10.11648/j.ajee.20140206.11
T2  - American Journal of Energy Engineering
JF  - American Journal of Energy Engineering
JO  - American Journal of Energy Engineering
SP  - 127
EP  - 132
PB  - Science Publishing Group
SN  - 2329-163X
UR  - https://doi.org/10.11648/j.ajee.20140206.11
AB  - Lignocellulosic materials (eg.Prosopis juliflora) can be utilized to produce ethanol, a promising alternative energy source for the limited crude oil. This study involved optimization of acid hydrolysis in ethanol production from prosopis juliflora. The conversion of prosopis juliflora to ethanol can be achieved mainly by three process steps: pretreatment of prosopis juliflora wood to remove lignin and hemicellulose, acid hydrolysis of pretreated prosopis juliflora to convert cellulose into reducing sugar (glucose) and fermentation of the sugars to ethanol using Saccharomyces cerevisiae in anaerobic condition. A two level full factorial design with four factors, two levels and two replicas (24*2=32 experimental runs) was applied to optimize acid hydrolysis and study the interaction effects of acid hydrolysis factors, namely, acid concentration, solid fraction, temperature, and time. An optimization was carried out to optimize acid hydrolysis process variables so as to determine the best acid concentration, solid fraction, temperature, and contact time that resulted maximum ethanol yield. The screening of significant acid hydrolysis factors were done by using the two-level full factorial design using design expert® 7 software. The statistical analysis showed that the ethanol yield of (40.91% (g/g)) was obtained at optimised acid hydrolysis variables of 0.5%v/v acid concentration, 5%w/w solid fraction, 105.01°C temperature, and 10 minutes hydrolysis time.
VL  - 2
IS  - 6
ER  -

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Author Information

Temesgen Atnafu Yemata

Institute of technology, Department of Chemical Engineering, Addis Ababa, Ethiopia

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Plain Text BibTeX RIS

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Temesgen Atnafu Yemata. (2014). Optimisation of Acid Hydrolysis in Ethanol Production from Prosopis Juliflora. American Journal of Energy Engineering, 2(6), 127-132. https://doi.org/10.11648/j.ajee.20140206.11

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ACS Style

Temesgen Atnafu Yemata. Optimisation of Acid Hydrolysis in Ethanol Production from Prosopis Juliflora. Am. J. Energy Eng. 2014, 2(6), 127-132. doi: 10.11648/j.ajee.20140206.11

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AMA Style

Temesgen Atnafu Yemata. Optimisation of Acid Hydrolysis in Ethanol Production from Prosopis Juliflora. Am J Energy Eng. 2014;2(6):127-132. doi: 10.11648/j.ajee.20140206.11

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@article{10.11648/j.ajee.20140206.11,
  author = {Temesgen Atnafu Yemata},
  title = {Optimisation of Acid Hydrolysis in Ethanol Production from Prosopis Juliflora},
  journal = {American Journal of Energy Engineering},
  volume = {2},
  number = {6},
  pages = {127-132},
  doi = {10.11648/j.ajee.20140206.11},
  url = {https://doi.org/10.11648/j.ajee.20140206.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajee.20140206.11},
  abstract = {Lignocellulosic materials (eg.Prosopis juliflora) can be utilized to produce ethanol, a promising alternative energy source for the limited crude oil. This study involved optimization of acid hydrolysis in ethanol production from prosopis juliflora. The conversion of prosopis juliflora to ethanol can be achieved mainly by three process steps: pretreatment of prosopis juliflora wood to remove lignin and hemicellulose, acid hydrolysis of pretreated prosopis juliflora to convert cellulose into reducing sugar (glucose) and fermentation of the sugars to ethanol using Saccharomyces cerevisiae in anaerobic condition. A two level full factorial design with four factors, two levels and two replicas (24*2=32 experimental runs) was applied to optimize acid hydrolysis and study the interaction effects of acid hydrolysis factors, namely, acid concentration, solid fraction, temperature, and time. An optimization was carried out to optimize acid hydrolysis process variables so as to determine the best acid concentration, solid fraction, temperature, and contact time that resulted maximum ethanol yield. The screening of significant acid hydrolysis factors were done by using the two-level full factorial design using design expert® 7 software. The statistical analysis showed that the ethanol yield of (40.91% (g/g)) was obtained at optimised acid hydrolysis variables of 0.5%v/v acid concentration, 5%w/w solid fraction, 105.01°C temperature, and 10 minutes hydrolysis time.},
 year = {2014}
}

Copy | Download

TY  - JOUR
T1  - Optimisation of Acid Hydrolysis in Ethanol Production from Prosopis Juliflora
AU  - Temesgen Atnafu Yemata
Y1  - 2014/12/22
PY  - 2014
N1  - https://doi.org/10.11648/j.ajee.20140206.11
DO  - 10.11648/j.ajee.20140206.11
T2  - American Journal of Energy Engineering
JF  - American Journal of Energy Engineering
JO  - American Journal of Energy Engineering
SP  - 127
EP  - 132
PB  - Science Publishing Group
SN  - 2329-163X
UR  - https://doi.org/10.11648/j.ajee.20140206.11
AB  - Lignocellulosic materials (eg.Prosopis juliflora) can be utilized to produce ethanol, a promising alternative energy source for the limited crude oil. This study involved optimization of acid hydrolysis in ethanol production from prosopis juliflora. The conversion of prosopis juliflora to ethanol can be achieved mainly by three process steps: pretreatment of prosopis juliflora wood to remove lignin and hemicellulose, acid hydrolysis of pretreated prosopis juliflora to convert cellulose into reducing sugar (glucose) and fermentation of the sugars to ethanol using Saccharomyces cerevisiae in anaerobic condition. A two level full factorial design with four factors, two levels and two replicas (24*2=32 experimental runs) was applied to optimize acid hydrolysis and study the interaction effects of acid hydrolysis factors, namely, acid concentration, solid fraction, temperature, and time. An optimization was carried out to optimize acid hydrolysis process variables so as to determine the best acid concentration, solid fraction, temperature, and contact time that resulted maximum ethanol yield. The screening of significant acid hydrolysis factors were done by using the two-level full factorial design using design expert® 7 software. The statistical analysis showed that the ethanol yield of (40.91% (g/g)) was obtained at optimised acid hydrolysis variables of 0.5%v/v acid concentration, 5%w/w solid fraction, 105.01°C temperature, and 10 minutes hydrolysis time.
VL  - 2
IS  - 6
ER  -

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